Center tube for centrifugal separators.



S. A. EKEHORN. CENTER TUBE FOR GENTRIFUGAL SEPARATORS.

' Patented May 9, 1911.

APPLICATION FILED JULY 24, 1909.

UNT

SVEN AUGUST EKEHORN,

or GEFLE,

FTQQ

SWEDEN.

CENTER TUBE FOR CENTRIFUGAL SEPARATORS.

To all whom it may concern:

Be it known that I, SVEN AUGUST Ennnonx, a subject of the King ofSweden, and residing at Gefle, Sweden, have invented certain new anduseful Improvements in Center Tubes for Centrifugal Separators, of whichthe following is a specification.

The present invention refers to an improvement in such centrifugalseparators in which the spindle is inserted into the lower part of thecenter tube by means of a tap. On account of this one must consider anarrangement of the outlet into the drum in such a manner that the milkcan be conducted right down into the lower part of the drum, asotherwise a uniform distribution of the milk cannot be effected.

The invention consists therein that sloping channels are arranged in thelower part of the center tube, outside the spindle tap, these channelsleading from the bottom of the milk inlet are provided with a slitextending along their outer walls to the top of the plate through whichthe milk is carried out into the insertion plates. These channels maybesides be made so that they continue above the bottom of the milk inletin its wall and form open tracks along it, which tracks serve forcollecting and bringing down the milk. Besides that, in order toproperly facilitate the practical working of the arrangement, the bottomof the center tube and drum may be made in separate parts which areunited with each other by means of a proper arrangement of screws.

The invention is shown in one constructional form in the attacheddrawing so that Figure 1 shows the center tube with attached drum-bottomin a vertical section, while Fig. 2 is a level section along line A to B(Fig. l).

l is the center tube which at the top is provided with the usualdownward boring 2 for letting in the milk, and at the bottom with anoutward opening 3 for the spindle tap. According to the inventionchannels 4 are arranged in the lower part of the center tube and,running obliquely downward, these channels are provided along theirouter walls with slits through which they are in connection with thedrum. In the style shown the holes 4 continue with depressions orgrooves 6 in the wall of the bor- Specification of Letters Patent.

Application filed July 24, 1909.

Patented May 9, 1911. Serial No. 509,427.

ing 2, which grooves serve for collecting and bringing down the milk,whereafter the latter is spread out between the plates by means of thechannels and slits 5. The holes 4 with the slits 5 are suitably made inthe usual springs 7 on the center tube, but can of course also be madeat any other place, for example in the portions between the flanges ofthe tube.

In order to facilitate the practical boring of holes 1 and the cuttingof slits 5, center tube 1 and the bottom of the drum 8 may suitably bemade in separate pieces. The center tube is provided with a flange 9,against which the bottom of the drum rests, and has a screw thread cutin its lower part. Nut 10 is screwed upon the center tube and fits intothe bottom of the wall and is in consequence thereof made conical,whereby, on tightening the nut, a good centering of the bottom of thedrum to the center tube and a rigid connection of the same is effected.The milk coming from outlet 2 is on-account of the position of channels4, pressed down along the walls of these channels and flows, during thewhole of this movement out through slits 5 which occupy the whole heightof the inserted plates, by reason of which a completely uniformdistribution of the milk and also a quicker outflow of the same iseffected. Besides these advantages several others are gained. The costof manufacture can be considerably reduced, besides which the inside ofthe channels as well as the center tube are accessible, whereby theadvantage is gained that no milk particles stick to the inside of thetube, as the latter can get an absolutely smooth surface. Furthermorecleaning of the tube is extremely easy.

Having now particularly described and ascertained the nature of the saidinvention and in what manner the same is to be performed I declare thatwhat I claim is:

In combination wit-l1 the drum of a centrifugal separator, a center tubedetachably fastened to the bottom of the drum, said tube having an inletchamber for inflowing liquid in its upper portion, and channelsextending from said inlet chamber in slanting direction through the wallof the tube to the bottom of the drum, said channels opening in radialdirection outwardly the openings extending from below the inlet chamberto the bottom of the drum, the inlet chamber being provided With groovesextending 10ngituclinally from the openings of said channels, the innersurface of Wall of the tubing below the inlet chamber being smooth anduninterrupted.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing Witnesses.

SVEN AUGUST EKEHORN.

Witnesses A. G. VERZGREN, WILHELM RUNSTEDT.

Copies of this patent may be obtained for five cents each, by addressingthe Gommissioner of Patents, Washington, I). G.

